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BS EN 317 1993

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This British Standard, having been prepared under the direction of the Technical Sector Board for Building and Civil Engineering B/-, was published under the authority of the Standa

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BRITISH STANDARD BS EN

317:1993

Particleboards and

fibreboards —

Determination of

swelling in thickness

after immersion in

water

The European Standard EN 317:1993 has the status of a

British Standard

UDC 674.03:674.815:674.817:620.192.53

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This British Standard, having

been prepared under the

direction of the Technical Sector

Board for Building and Civil

Engineering (B/-), was

published under the authority

of the Standards Board and

comes into effect on

15 April 1993

© BSI 07-1999

The following BSI references

relate to the work on this

standard:

Committee reference B/541

Draft for comment 90/16001 DC

ISBN 0 580 21136 3

Cooperating organizations

The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries:

Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y

France Association française de normalisation Germany Deutsches Institut für Normung e.V

Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland

Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portuguès da Qualidade Spain Asociación Española de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige

Switzerland Association suisse de normalisation United Kingdom British Standards Institution

Amendments issued since publication

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BS EN 317:1993

Contents

Page

National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-reference Inside back cover

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ii © BSI 07-1999

National foreword

This British Standard has been prepared under the direction of the Technical Sector Board for Building and Civil Engineering and is the English language

version of EN 317:1993 Particleboards and fibreboards — Determination of

swelling in thickness after immersion in water, published by the European

Committee for Standardization (CEN)

EN 317 was produced as a result of international discussion in which the UK took

an active part

The principle of the method is technically equivalent to A.7 of BS 1142:1989

Specification for fibre building boards and to clause 19 of BS 5669-1:1989

Particleboard — Part 1 Methods of sampling, conditioning and test, both of which

will be withdrawn in due course

A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover

This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover

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EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 317

February 1993

UDC 674.03:674.815:674.817:620.192.53

Descriptors: Particleboard, fibreboard, cement-bonded particleboard, test method, swelling in thickness, immersion test

English version

Particleboards and fibreboards — Determination of swelling in thickness after

immersion in water

Panneaux de particules et panneaux

de fibres — Détermination du gonflement en

épaisseur après immersion dans l’eau

Spanplatten und Faserplatten — Bestimmung der Dickenquellung nach Wasserlagerung

This European Standard was approved by CEN on 1992-12-15 CEN members

are bound to comply with the CEN/CENELEC Internal Regulations which

stipulate the conditions for giving this European Standard the status of a

national standard without any alteration

Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the Central Secretariat or to any

CEN member

This European Standard exists in three official versions (English, French,

German) A version in any other language made by translation under the

responsibility of a CEN member into its own language and notified to the

Central Secretariat has the same status as the official versions

CEN members are the national standards bodies of Austria, Belgium,

Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,

Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and

United Kingdom

CEN

European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

© 1993 Copyright reserved to CEN members

Ref No EN 317:1993 E

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© BSI 07-1999 2

Foreword

This European Standard was prepared by Working

Group 1 “Particle-boards” (Secretariat: Germany)

and Working Group 3 “Fibreboards”

(Secretariat: Italy) of Technical Committee

CEN/TC 112 “Wood-based panels”

(Secretariat: Germany)

This standard is one of a series specifying methods

of test for determining the properties of

particleboards and fibreboards

No existing European Standard is superseded

This European Standard shall be given the status of

a national standard, either by publication of an

identical text or by endorsement, at the latest by

August 1993, and conflicting national standards

shall be withdrawn at the latest by December 1994

In accordance with the CEN/CENELEC Internal

Regulations, the following countries are bound to

implement this European Standard:

Austria, Belgium, Denmark, Finland, France,

Germany, Greece, Iceland, Ireland, Italy,

Luxembourg, Netherlands, Norway, Portugal,

Spain, Sweden, Switzerland, United Kingdom

Contents

Page

Annex A (informative) Bibliography 5 Figure 1 — Test piece for the measurement of

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EN 317:1993

1 Scope

This European Standard specifies a method of

determining the swelling in thickness of

flat-pressed or drum-pressed particleboards,

fibreboards, and cement-bonded particleboards

2 Normative references

This European Standard incorporates by dated or

undated reference, provisions from other

publications These normative references are cited

at the appropriate places in the text and the

publications are listed hereafter For dated

references, subsequent amendments to or revisions

of any of these publications apply to this European

Standard only when incorporated in it by

amendment or revision For undated references the

last edition of the publication referred to applies

EN 325, Wood-based panels — Determination of

dimensions of test pieces

EN 326-1, Wood-based panels — Sampling, cutting

and inspection

EN 326-1, Sampling and cutting of test pieces and

expression of test results1)

3 Principle

Swelling in thickness is determined by measuring

the increase in thickness of the test piece after

complete immersion in water

4 Apparatus

4.1 Micrometer

Micrometer, according to EN 325.

4.2 Water bath

A thermostatically controlled water bath, capable of

maintaining a temperature of (20 ± 1) °C and in

which the test pieces can be maintained in the

conditions specified in 6.2.

5 Test pieces

5.1 Sampling

Sampling and cutting of the test pieces shall be

carried out according to EN 326-1

5.2 Dimensions

The test pieces shall be square with a side length

of (50 ± 1) mm

5.3 Conditioning

The test pieces shall be conditioned to constant mass in an atmosphere with a mean relative humidity of (65 ± 5) % and a temperature

of (20 ± 2) °C Constant mass is considered to be reached when the results of two successive weighing operations, carried out at an interval of 24 h, do not differ by more than 0,1 % of the mass of the test piece

6 Procedure

6.1 Thickness measurement

The thickness of each test piece shall be measured to

an accuracy of ± 0,01 mm at the intersection of the diagonals, according to EN 325 (Figure 1)

6.2 Immersion

Immerse the test pieces with their faces vertical in clean, still water, having a pH of 7 ± 1 and a temperature of (20 ± 1) °C This temperature shall

be maintained throughout the test period During the test, the test pieces shall be separated from each other and from the bottom and the sides of the water bath The upper edges of the test pieces shall be covered by (25 ± 5) mm of water throughout the test The water shall be changed after each test The immersion times shall be as specified by the individual standards for the different board types

6.3 Further procedure

After the immersion time has elapsed, take the test pieces out of the water, remove excess water and

measure the thickness of each test piece (6.1).

1) At present in the draft stage.

Figure 1 — Test piece for the measurement

of swelling in thickness

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4 © BSI 07-1999

7 Expression of results

7.1 For each test piece

The swelling in thickness of each test piece, Gt,

expressed as a percentage of original thickness shall

be calculated according to the following formula:

Swelling in thickness shall be expressed to one

decimal

7.2 For a board

The swelling in thickness of a board is the

arithmetic mean of the results of all test pieces

taken from that board and shall be expressed in

percentage, to one decimal

8 Test report

According to EN 326-1

Additionally: The results of this test, including the

time of immersion

where

t1 is the thickness of the test piece before

immersion, in millimetres;

t2 is the thickness of the test piece after

immersion, in millimetres

Gt t2–t1

t1

-×100

=

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EN 317:1993

Annex A (informative)

Bibliography

EN 300, Particleboards: Oriented Strand Boards (OSB)2)

EN 309, Wood particleboards — Definition and classification

EN 312-2, Particleboards — Specifications — Part 2: Requirements for general purpose boards2)

EN 312-3, Particleboards — Specifications — Part 3: Requirements for boards for use in interior fitments

(including furniture) in dry conditions2)

EN 312-4, Particleboards — Specifications — Part 4: Requirements for load-bearing boards for use in dry

conditions2)

EN 312-5, Particleboards — Specifications — Part 5: Requirements for load-bearing boards for use in

humid conditions2)

EN 312-6, Particleboards — Specifications — Part 6: Requirements for heavy-duty load-bearing boards for

use in dry conditions2)

EN 312-7, Particleboards — Specifications — Part 7: Requirements for heavy-duty load bearing boards for

use in humid conditions2)

EN 316, Wood fibreboards — Definition, classification and symbols

EN 622-2, Fibreboards — Specifications — Part 2: Requirements for hardboards2)

EN 622-3, Fibreboards — Specifications — Part 3: Requirements for medium boards2)

EN 622-4, Fibreboards — Specifications — Part 4: Requirements for softboards2)

EN 622-5, Fibreboards — Specifications — Part 5: Requirements for dry process fibreboards2)

EN 633, Cement-bonded particleboards — Definition and classification2)

EN 634-1, Cement-bonded particleboards — Specifications — Part 1: General requirements2)

2) At present in the draft stage.

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BS EN 317:1993

© BSI 07-1999

National annex NA (informative)

Committees responsible

The United Kingdom participation in the preparation of this European Standard was entrusted by the Technical Sector Board for Building and Civil Engineering (B/-) to Technical Committee B/541, upon which the following bodies were represented:

American Plywood Association

Association of British Plywood and Veneer Manufacturers

British Woodworking Federation

Chartered Institute of Building

Coordinator for Timber and Timber Products

Council of the Forest Industries of British Columbia

Department of the Environment (Timber Division, Building Research Establishment)

Fibre Building Board Organisation (FIDOR)

Finnish Plywood International

Flat Roofing Contractors Advisory Board

Forestry Commission

Furniture Industry Research Association

Institution of Structural Engineers

National Federation of Roofing Contractors

National Housebuilding Council

National Panel Products Association

Royal Institute of British Architects

Timber Research and Development Association

Timber Trade Federation

United Kingdom and Ireland Particleboard Association

Coopted member

National annex NB (informative)

Cross-reference

Publication referred to Corresponding British Standard

EN 325:1993 BS EN 325:1993 Wood-based panels — Determination of dimensions of test pieces

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